William thomas ckoslen



rarnnr WILLIAM THOMAS GROSLEN', F SPRINGFIELD, MISSOURI.

STOVE.

Application filed October 26, 1921. Serial No. 510,589.

To all whom it may concern:

and distinctly claime cially soft coal), which may be readily ap- Be it known that l W'ILLIAM T. CnosLnN 7 7 a citizen of the United States, residing at Springfield, in the county of Greene, State of Missouri, have invented certain new and useful Improvements in Stoves, of which the following is a specification, containing a full, clear, and exact description, reference being had to the accompanying drawing, forming a parthereof My invention consists in the novel disclosure hereinafter particularly described The object of my invention is to provide an improved devloe for burning fuel (espeplied to heating-stoves, furnaces, waterheaters, ranges and other fuel'burning appa- ,ratus; whereby the fuel will be very economically consumed, soot and smoke will be prevented, and a blue flame will be produced in the combustion-chambers of the stove or other fuel-burning apparatus.

In the drawing,

Fig. 1 is a vertical section of one formof heating-stove, having my invention embodied therein, and

Fig. 2 is a fragmentary plan-view oft-he top of the stove and adjacent parts, with the outer perforated cover detached.

The numeral 1 designates the outer casing of the stove or other heatingapparatus, provided with any suitable form of ash-pan 2, grate 3 and smoke-pipe 4.

An outer cover 5 has a series of air-inlets or perforations 30, and 1s detachably (or movably) mounted over a central opening,

formed in the horizontal. top-plate 19.

A fire-box 6 is located inthe lower portion of the stove or other, fuel-burning apparatus, and a narrow annular combustion-chamber 7 is formed between the upper vertical. wall of said fire-box and the adjacent outer cylindrioal casing 12, which projects downwardly into said fire-box a considerable distance.

Said vertical .wall of said fire-box 6 is provided with numerous small holes or perforations 8, which actas air-ducts, and supply the said annular combustion-chamber 7 withfresh air, at a point above the fuel that is burning on said grate 8, and at points directly opposite small air-ducts or holes 14 which are formed in the adjacent vertical wall of said'casing 12. i

A fuel magazine 11 is located within said casing 12, so as to form an annular hot-air space 10 between said magazine and said casing, the lower ends of the latter and the magazine being joined by a ring-like head,

through the large central opening of which .i the soft-coal or other fuel may freely pass from said magazine directly into the lower part of the said fire-box 6, and be thereat supportedby the said grate 3.

A horizontal partition 9 is located within the said outer casing 1 of thestove or other fuel-burning apparatus, at a point sufii ciently elevated to support the said fire-box 6, which is preferably (as shown) made integral with said partition; said partition being fixed to the said outer casing, in any desired workman-like manner, so that all passage of air from the space below said a partition to the space above the same must take place through the said fire-box airducts 8, and through the fuel in the lower part ofsaid fire-box.

-l Suitable L-shaped supporting-brackets 15 extend radially from the said partition'9 to the adjacent outer wall 12 of the annular hot-air space 10, to support said wall and the fuel magazine 11, and hold them in proper relation to the said fire-box 6 and the annular combustion-chamber 7 suitable rivets vor other fastening-means being used, as

shown, to fasten said brackets to said partition and to said outer w all '12.

A. fire-door 24 is connected to the interior of the said tire-box 6 by; a common. fire door throat 25, to alfordaccess to the interior of the fire-box, 11]. starting a tire, and in clean ing out the fire-box when. the grate 3 is not y A ring-like head having a series of small air-inlets or openings 16, connects the upper adjacent ends of the said fuel magazine 11, anda ring-like register-plate 17 is provided with a series of small air-openings 20, and is rotatably mounted upon the said head in such a manner that the airopenings 20 of said register-plate will register with said air-inlets 16 of said head when it is desired to permit an to pass into the upper end of the said annular hot-air space 10.

When it is desired to cut off, or decrease, the entrance of air to the said upper end of said annular hot-air space the said --reg,

ister-plate is moved accordinglyfto aposition Where said air-inlets 16 0f said head of the hot-air space will be more or less ob structed by an imperforate part of said reg-, ister-plate.

An L-shaped handle 18 is attached to or formed integral with the outer marginal edge of the said register-plate 17, and extends to the exterior of the top-plate 19 of the stove through a slot 18 which is formed therein; whereby the said register-plate may be set as required for the most economical operation. j An inner cover 21 isdetachably mounted upon the said register-plate 17, and is provided with a cold-airopening 22, through which air is admittedto the-upper end of the said fuel-magazine 11, to keep cool the.

fuel that is contained in the latter, and thereby assure its certain movement toward the fire-box 6, as wanted.

A hinged slide 23 is mounted upon said innermagazine-cover 21, over the said coldair opening 22 thereof, to control the en-= trance of air thereat, as requiredfor the most successful operation.

An annular flange 26 depends from the underside of said top-plate 19, and the upper end of the outer wall 12 of said hotair space 10 is secured thereto by means of rivets or other fastenings; thereby bracingand supporting the upper ends of said hotair space and said fuel magazine.

1 .do not confine -myself to any specific materials, asthose skilled in the art of stove manufacturing will readily select the most efficient .material forv each part of the apparatus; nor do 1 limit .myself to the exact form or proportions of parts .herein shown, as it will be readily understood that such changes as readily suggest themselves to skilled mechanics maybe made without departing from. .the' spirit of my invention and the scope of. my claim.

Upon lighting a fire in the fire-box'G, and supplying the magazine 1.1 with fuel (say soft coal), the following operations will take place The said smoke. 138 if connected to a asuitalile chimney for other .suctiomproducing apparatus, will create a partial vacuum within the outer casing 1, above the said horizontal partition 9.

Then, upon opening the cold-air slide 29 a supply of air will enter the space below said horizontal partition 9, and part of said air will pass upwardly through the fuel on the grate 3, and'the fuel on the latter will be burned, and the smoke and products of such primary combustion will pass into the said annular combustion-chamber 7, wherein it simultaneously meets and is subjected to the action of the numerous small opposite jets of air issuing from the opposite perforations or ducts 8 oft-he vertical wall of said fire-box, and the ducts 14.- of the closely adjacent vertical Wall 12 of the annular hot-air space 10; which willcause all grate, to. burn with anintehsely-hotblue flame, in the'upper part ofsaid annular combustion-chamber 7, as well as directly above the same in the main heating space of the, apparatus above the said horizontal partition.

Said blue flame will, of course, heat the. outer casing 1, or other substitute therefor, to a degree depending upon the quantity of fuel consumed in a given time.

Said blue flame will also, ofcourse, heat the outer wall 12 of the said annular hotair'chamber .10, so that the supply of hot air for the previously-mentioned hot-air ducts 14 will be ample and satisfactory, if the said hot-air register-plate is set to permit a suflicient supply of cold air to flow into said hot-air chamber 10 by way of the saidregisterin air-openings 16 and 20 at the upper end of said hotair chamber.

Said outer Wall 12 of the hot-air chamber 10 protects the fuel-magazine11 from the extreme heat of the blue smokeless flame which surrounds said outer wall and saidhotair chamber having "a series of hot-air ducts formed in its lower portion, which projects downwardly I into said fire-box such a distance that the hot-air ducts of said hot-air chamber are located and arranged to discharge directly opposite the air-ducts of said firebox, an annular combustionchambersurrounding the lower portion of said hot-air chamber, and the walls of said fire-box surrounding said annular combustion-chamber, so that the jets .of air from .the air-ducts of both fire-box and hot-air chamber will .meet and commingle"-aaith the products of combustion that pass from said fire-box into said annular combustion-chamher; a fuel-magazine surrounded by the said annular hot-air chamber; means for regulating and supplying cold air to the upper end of said hot-air chamber; "means for supplying and regulating air at the upper end of said magazine; and means for regulating the entrance of air to the fire-box through the grate thereof and through the 10 said air-ducts thereof.

In testimony whereof, I have signed my name to this specification in presence of tWo subscribing Witnesses.

WILLIAM THOMAS CROSLEN.

Witnesses:

C. S. BREWER, F. L. MURPHY. 

